Best humidity monitor

What is the best humidity monitor to buy? I am willing to pay more if it is significantly better. I live in a fairly dry area of N. CA and had trouble hatching turkey eggs last season. I think my humidity was off. I have a wooden cabinet incubator that maintains temperature well but I need something better for humidity.
Thanks,
Laura

I use three humidity gadgets in my incubator. Two I bought at our local pet shop from the reptile section. They are on the smaller size but I get a better reading with them. They ran me a couple dollars each. The last one is digital and I keep it around more for temp than humidity reading. I bought this one at Wally World in the humidifier area.This one ran me $9.00 and its reading has been off from the beginning.

soo confusing when placed side by side they read the same as the one I had that was suppose to be of by 14%. its very strange to have three hygrometers all reading the same..
but when calibrated they are all off so much....it almost seems calibrating is wrong. Should I just assume that they are all off by the same amount and use them. and add 14 or assume they are all correct. . 14% is a lot. it could make a difference in hatching or not. If i add 14% at lockdown and that is wrong I would only be at 63%

how can three different hygrometers all reading the same.....when calibrated be off by the same amount